Comb and fingers for loom dobbies



June 4, 1929. GORDON 1,716,046

COMB AND FINGERS FOR LOOM DOBBIES Original Filed Aug. 6, 1926 [We/7% zq/ie/ f H gar/0A Patented June 4, 1929'.

UNITED STATES w matte earner orries.

ALBERT A. sermon, on WORCESTER, asisacnnsnrrs, Assrcnoa To cRoMr'ron & NOWLES LOOM WORKS, or won-enema, MASSACHUSETTS, noonronarron or MASSACHUSETTS.

COMB AND FINGERS FOR LOOIAtE DOBBIE S.

Original application filed August 6, 1926, Serial No. 127,626. Divided and this application filed October 27, 1927. Serial No. 229,217. 1 I

5 looms and spacing devices therefor and it is the general object of the invention'to improve upon the arrangement of the fingers and the devices which separate the same.

' Loom dobbies are usually provided with a number of flat vertically disposed so-called fingers Which respond to the pattern mechanism and have dobby hook controlling portions so that when a finger is lifted the corresponding hook will be lowered to come into the path of a reciprocating knife. One form bf dobby chain is made up of a series of wooden bars having hardened steel pegs projecting therefrom to extend into grooves formed in the underside of the fingers.- The pegs are comparatively small and the fingers are narrow and it is therefore necessary to provide means for holding the fingers in properly spaced relation to register with the pegs. This result is usually accomplished by reducing the thickness of the ends of the fingers to provide spaces to receive dents or Wires of a spacing comb. When the fingers are made of cast iron the thin ends are likely to break. and it is a further object of my invention to provide means for spacing the fingers so arranged that the fingers need not have reduced ends to co-operate with the spacing comb but may be made of substantially uniform thickness.

With these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein one form of my invention is shown,

' Fig. 1 is a vertical section through a cylinder showing a portion of a dobbyand the fingers which cooperate with the pattern chain, and

Fig. 2 is a top plan view taken in the direc tionof arrow 2, Fig. 1

Referring particularly to Fig. 1 I have provided a dobby frame 11 which supports a rocking shaft 12 on which is mounted a dobby cylinder 13 to give progressive movements to pattern chain 14. A stationary shaft '15 is mounted on. the frame 11 and supports dobby fingers certain of which as shown at 16 are provided with upwardly extending-arms 17 and certain others of which as shown at 18 have downwardly extending arms 19. The parts thus far described with theexception of the length of the dobby fingers are common constructionand form no part of my present invention. l

My present invention relates to the comb and fingers and in carrying my invention into effect I providera support 20 on-which all of the fingers may rest but I make certain of the fingers such as thoseindicated at 18 shorter than the other fingers 16. Separating pegs or pins 21 are carried by the supp0rt 20and lie between and are positioned. for engagement with the longer fingers 16. r The pins 21 are disposed. as shown in Fig. 2 in a line or row transversely of the fingers, being in alignment with certain portions of the longer fingers to engage and guide them. .Each pin is in alignment with the shorter finger c0rresponding thereto, butis so placed that it cannot engage the shorter finger. I

From the foregoing it will be seen that I have provided a separating comb for dobby fingers wherein the parts areso related that said comb may have fewer separating pegs or pins than there are finge'rs in the dobby and it will further be seen that said pegs or pins directly engage certain selected fingers to guide them-and that the latter in turn guide the remaining fingers. It will also be seen that the dobby fingers may be madeof uniform thickness so as to reduce liability of breakage and to permit said fingers to be made of sheet steelor other acceptable sheet metal. 2

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in theart without departing from the spiritand scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: I

'1. In a loom dobby, pattern mechanism, a pluralityof dobby fingers to cooperate wlth the pattern mechanism, and a guiding rack for said fingers, said rack having separating elements for the fingers, certain of the fingers being extended to project between the separating elements and certain other fingers being shorter than the first named fingers and the pattern mechanism, a separating and spacing device extending substantially perpendic-ular to said fingers, spacing elements carried by the device and extending in a direction parallel to the planes of the fingers,

certain of said "fingers having portions capable of engagement with said elements to be spaced directly by said elements, and the remaining fingers being shorter so as to be out of engagement with said elements .and to be spaced by the other fingers.

4. In a dobby for a iloom having a pattern mechanism, a set of fingers one end of each of which is weighted to cooperate with the pattern mechanism, said fingers :being of two types, a spacing and separating device for the fingers, elements extending from 'the device and lying between and positioned for engagement with the weighted ends of the fingers of one type tospace the latter and being in alignment with but out of engaging position with'respect to $118 weighted ends of the fingers of the other type, the fingers :of the first named type-separating the fingers of the second named type.

5. In a dobby'for a loom 'having a pattern mechanism,a set of fingers one end of each of which is weighted to cooperate with the pattern mechanism, said .fingers being'of two types, a plurality of substantially aligned separating elements extending substantially perpendicularly to :the length of the Efingers, the weighted portions of one type of finger being positioned forengagement with the elements and each .of said elements being in alignment with .the weightedends-ofone of the fingers of the other type, the fingers of the second type being spaced by the fingers of the first type.

i '6. In adobby fora-loom having a pattern 1neclianis'n1,'aset of fingers one end of each of which is weighted -to cooperate with the pattern mechanism, said fingers being of two types, a row 0f spaced separating elements, the weighted end of the fingers of one type extending. across the row of elements to be positioned by direct engagement with said elements, and the weighted 'endsofthe other type of finger being out'of engaging position relatively to the elements and .positioned by the fingers of the first named type.

7. In a loom dobby having a pattern surface, a set of dobby fingers to cooperate with the pattern surface, a pair of supports for said fingers one located on'each side of the pattern surface, one of said supports always having operative engagement with all the fingers and the other support having operativeengagement only with the fingers which are not operatively related to the pattern surface, said fingers being oftwo typesand separating means to have engagement with the fingers of one type to position :the zla'tter adacent the support which has holding engagement with :those fingers only which are not operatively related to the pattern surface, and the fingers of the other type being positioned by the fingers of the first named-type.

8. In a loom dobby having a pattern surface, a set of dobby fingers, a support disposed on one side of the pattern .surface .to have supporting engagement at all times with all the fingers, a second support located on the other sideof the patternsurface adapted to have operative engagement with all the fingers but being operatively related only to such fingers as are out of cooperative relationship with the pattern surface, said fingers being of two types, a separating .means located between the fingers of one type and engaging and positioning the fingers of this type, the fingers of the other type being in substantial alignment with the separating means but out of engagement with the latter and positioned by the fingers of the first, named type.

9. In a loom dobby having apatternsurface, a set of dobby fingers, a support having operative relation with all of the fingers at all times, a second support adapted to support all of the fingers but operatively related only to those fingers which are out of operative relationship with the pattern surface on any given pick ofthe loom, separating elements associated with the second named support, the fingers being of two types, .the fingers of thefirst type extending beyond said separatingelements and separated and positioned by the latter, .and the .fingers of the other 'type being out of engagement with .the

elements and in substantial alignment with the latter and positioned by the fingers of .the first named type. e

In testimony whereof I'have hereunto affiXed my signature.

ALBERTA. eonnon. 

